Testing rock specimen for Uniaxial Compressive …

THE UNIAXIAL COMPRESSIVE STRENGTH OF SOFT …

uniaxial compression test for soft rock is often replaced by a point load strength index test. This test is simpler in procedures than that of the uniaxial compression test, and the test does not need necessarily cylindrical samples. A conversion factor is then applied to the point load strength index, I S(50), for estimating the uniaxial compressive …

USING THE POINT LOAD TEST TO DETERMINE THE …

ASTM D2938 | Testing Services | Standard Test Method …

A rock core sample is cut to length and the ends are machined flat. The specimen is placed in a loading frame and, if required, heated to the desired test temperature. Axial load is continuously increased on the specimen until peak load and failure are obtained. Unconfined compressive strength of rock is used in many design formulas and is ...

Laboratory Uniaxial compression test - Rock Mechanics ...

Automatic Uniaxial and Triaxial test system, Rock ...

The Automatic configuration for determining the elastic modulus and strength characteristics of rock specimens under uniaxial and triaxial conditions is based on the AUTOMAX Multitest control console for axial load and SERCOMP 7 …

Suggested Methods for Determining the Uniaxial …

Measurement Uncertainty in Testing of Uniaxial …

rock sample uniaxial compressive strength and deformability. The interdependence of uncertainty contribution is analyzed and The interdependence of uncertainty contribution is analyzed and guides for improving measurement uncertainty are given. The achieved uncertainties are compared to typical uncertainties in the

What is the difference between unconfined compressive...

Uniaxial compressive strength is the ultimate compressive stress of the rock specimen failure under uniaxial compression conditions. Unconfined compressive strength means that the strength of a rock or soil sample when crushed in one direction in a triaxial test without any lateral restraint. I ...

Compressive strength of rocks - PetroWiki

Estimating compressive strength. General rock failure criterion can be reduced to a few parameters dependent on lithology (m) and the uniaxial compressive strength (C 0).Lithology is commonly derived during log analysis, so m may be estimated (Table 1).What is needed still is an initial measure of rock strength provided by C 0. C 0 can …

8. STRENGTH OF SOILS AND ROCKS

strength is the most commonly measured strength parameter and this is also true of rock specimens. For the uniaxial or unconfined compressive strength test a right circular cylinder of the material is compressed between the platens of a testing machine as illustrated in Fig. 8.1. The compressive strength is then defined as the maximum load …

Evaluation of the ratio between uniaxial compressive ...

Schmidt rebound hammer (SRH) test has been used worldwide as an index test for estimating the compressive strength and deformation characteristics of intact rocks. Although there is a high correlation between the surface hardness and the uniaxial compressive strength (UCS) of intact rocks, the SRH ...

unconfined compressive strength - Schlumberger …

A measure of a material's strength. The unconfined compressive strength (UCS) is the maximum axial compressive stress that a right-cylindrical sample of material can withstand under unconfined conditions—the confining stress is zero.